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| Useful advice - hardware related |
Help on soldering
- Use a good soldering iron with fine pencil tip.
It is important to have a clean tip. Do not use very abrasive surfaces to clean / polish the soldering iron tip. if the tip looks bent or damaged, it is worth investing in a new tip.
- Please take all precautions while using soldering irons.
- Solder on a fire resistant surface. Homosote, or dry wall are good .
- Never leave your iron plugged in and unattended..
AVR ADC inputs scanning example
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| AVR tutorials - AVR Analog/Digital converter ADC |
When interfacing microcontroller to outside world we often need to make Analog/Digital conversions (ADC). In this example, we will make 5 ADC inputs scanning that is driven by interrupt. Data are placed in results buffer and sent to UART by using functions for conversion of integer value to string.
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AVR external interrupts - INT0 example
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| AVR tutorials - AVR external interrupts |
When reading pin state it is often needed to react very fast on pin state change.
For this purpose external interrupt is used. External interrupt occurs when dedicated pin changes state. It can be triggered on rising, falling, or both edges of signal state. In this example we will use external interrupt of AVR microcontroller INT0.